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Multiple Choice

GLUMA contains what percentage of HEMA?

HEMA is a hydrophilic monomer that helps a bonding desensitizer wet and penetrate moist dentin, enabling a strong bond with adhesive resins after polymerization. GLUMA uses about 35% HEMA, paired with a small amount of glutaraldehyde (around 5%) and water. The glutaraldehyde helps desensitize by occluding dentinal tubules, while the 35% HEMA provides good wetting and resin infiltration. If the HEMA content were much lower, wetting and penetration would be inadequate for effective bonding; at 35%, the formulation balances flow, wetting, and resin infiltration, making 35% the correct value.

HEMA is a hydrophilic monomer that helps a bonding desensitizer wet and penetrate moist dentin, enabling a strong bond with adhesive resins after polymerization. GLUMA uses about 35% HEMA, paired with a small amount of glutaraldehyde (around 5%) and water. The glutaraldehyde helps desensitize by occluding dentinal tubules, while the 35% HEMA provides good wetting and resin infiltration. If the HEMA content were much lower, wetting and penetration would be inadequate for effective bonding; at 35%, the formulation balances flow, wetting, and resin infiltration, making 35% the correct value.